<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区域-->
    <el-card class="box-card">
      <!--添加角色按钮-->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
       <!--角色列表区域-->
      <el-table :data="roleslist" border stripe>
        <!--展开行-->
        <el-table-column type="expand" >
            <template #default={row}>
              <!--三层 for 循环实现各级权限-->
              <el-row :class="['bdbottom', i1===0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in row.children" :key="item1.id">
                <!--渲染一级权限-->
                <el-col :span="5">
                  <el-tag @close="removeRightById(row,item1.id)" closable>{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!--渲染二级和三级权限-->
                <el-col :span="19">
                  <!--通过 for 循环实现二级权限-->
                  <el-row :class="[ i2===0 ? '':'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success" @close="removeRightById(row,item2.id)" closable>{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(row,item3.id)">{{item3.authName}}</el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
              <!--pre 标签一般用来保留格式-->
            </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template #default={row}>
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--添加角色的对话框-->
    <el-dialog title="提示" :visible.sync="addDialogVisible" width="30%" @close="addRoleClosed">
      <!--内容主题区域-->
      <el-form status-icon :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="90px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!--底部区域-->
      <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addRole">确 定</el-button>
  </span>
    </el-dialog>
    <!--修改用户的对话框-->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form status-icon :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="90px">
        <el-form-item label="角色id">
          <el-input v-model="editForm.roleId" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editUserInfo">确 定</el-button>
  </span>
    </el-dialog>
    <!--分配权限的对话框-->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClose">
      <!--树形控件-->
      <el-tree show-checkbox :data="rightsList" :props="treeProps" node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="setRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色的列表数据
      roleslist: [],
      // 控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      // 添加角色
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加用户的验证规则对象
      addFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur'
          },
          {
            min: 0,
            max: 10,
            message: '长度在 0 到 10 个字符',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur'
          },
          {
            min: 0,
            max: 20,
            message: '长度在 0 到 20 个字符',
            trigger: 'blur'
          }
        ]
      },
      // 编辑角色信息的验证规则对象
      editFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur'
          },
          {
            min: 0,
            max: 10,
            message: '长度在 0 到 10 个字符',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur'
          },
          {
            min: 0,
            max: 20,
            message: '长度在 0 到 20 个字符',
            trigger: 'blur'
          }
        ]
      },
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的角色对象
      editForm: {},
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中节点的 id 值
      defKeys: [],
      // 角色 id 保存
      roleId: ''
    };
  },
  created () {
    this.getRolesList();
  },
  methods: {
    // 获取所有的角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles');
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败');
      }
      this.roleslist = res.data;
      console.log('获取角色列表', this.roleslist);
    },
    // 监听添加角色对话框关闭事件
    addRoleClosed () {
      this.$refs.addFormRef.resetFields();
    },
    // 添加角色
    addRole: async function () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return false;
        // 发起网络请求
        const { data: res } = await this.$http.post('roles', this.addForm);
        if (res.meta.status !== 201) return this.$message.error('添加角色失败');
        this.$message.success('添加新角色成功');
        // 隐藏添加角色的对话框
        this.addDialogVisible = false;
        // 重新获取角色列表
        await this.getRolesList();
      });
    },
    // 展示编辑角色对话框
    async showEditDialog (id) {
      console.log('当前行', id);
      const { data: res } = await this.$http.get('roles/' + id);
      console.log('当前行角色信息', res);
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败');
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    // 根据 id 删除对应的角色信息
    async removeRoleById (id) {
      // 询问用户是否确认删除
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err);
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除角色');
      }
      const { data: res } = await this.$http.delete(`roles/${id}`);
      console.log('已经删除的角色', res);
      if (res.meta.status !== 200) return this.$message.error('删除角色失败');
      this.$message.success('删除角色成功');
      await this.getRolesList();
      // console.log(id);
    },
    // 监听编辑角色页面的关闭
    editDialogClosed () {
      this.$refs.editFormRef.resetFields();
    },
    // 修改角色信息并提交
    editUserInfo () {
      // 保存下刚开始的信息
      const that = this.editForm;
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return false;
        // 检查下是否并未修改
        if (that === this.editForm) {
          this.editDialogVisible = false;
          return false;
        }
        // 发起修改角色信息的数据请求
        const { data: res } = await this.$http.put(`roles/${this.editForm.roleId}`, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc });
        if (res.meta.status !== 200) return this.$message.error('更新角色信息失败');
        // 关闭对话框
        this.editDialogVisible = false;
        // 刷新数据列表
        await this.getRolesList();
        // 提示修改成功
        this.$message.success('更新角色信息成功');
      });
    },
    // 根据 id删除角色权限
    async removeRightById (role, rightId) {
      // 弹窗提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err);
      // .catch(err){
      // return err
      // }
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除');
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败');
      }
      // await this.getRolesList();
      // getRolesList 方法因为数据变化会重新渲染
      role.children = res.data;
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id;
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree');
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败');
      }
      this.rightsList = res.data;
      // console.log(this.rightsList);
      // 递归获取三级节点的 id
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    // 通过递归的方式获取角色下所有权限的 id,并且保存到 defKeys 数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach(item => this.getLeafKeys(item, arr));
    },
    // 监听分配权限的对话框的关闭
    setRightDialogClose () {
      this.defKeys = [];
    },
    // 分配权限
    async setRights () {
      const keys = [
        // 使用扩展运算符合并两个数组
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];
      // console.log(keys);
      const idStr = keys.join(',');
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr });
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败');
      }
      this.$message.success('分配权限成功');
      await this.getRolesList();
      this.setRightDialogVisible = false;
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}

.bdtop{
  border-top: 1px solid #eee;
}

.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
